process.cc (6110:5051aafec8d5) process.cc (6650:f23a18fec0ef)
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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27 *
28 * Authors: Gabe Black
29 * Ali Saidi
30 * Korey Sewell
31 */
32
33#include "arch/mips/isa_traits.hh"
34#include "arch/mips/process.hh"
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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27 *
28 * Authors: Gabe Black
29 * Ali Saidi
30 * Korey Sewell
31 */
32
33#include "arch/mips/isa_traits.hh"
34#include "arch/mips/process.hh"
35
35#include "base/loader/object_file.hh"
36#include "base/misc.hh"
37#include "cpu/thread_context.hh"
36#include "base/loader/object_file.hh"
37#include "base/misc.hh"
38#include "cpu/thread_context.hh"
39
40#include "mem/page_table.hh"
41
42#include "sim/process.hh"
43#include "sim/process_impl.hh"
38#include "sim/system.hh"
39
40using namespace std;
41using namespace MipsISA;
42
43MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params,
44 ObjectFile *objFile)
45 : LiveProcess(params, objFile)

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57
58 // Set up region for mmaps. For now, start at bottom of kuseg space.
59 mmap_start = mmap_end = 0x10000;
60}
61
62void
63MipsLiveProcess::startup()
64{
44#include "sim/system.hh"
45
46using namespace std;
47using namespace MipsISA;
48
49MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params,
50 ObjectFile *objFile)
51 : LiveProcess(params, objFile)

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63
64 // Set up region for mmaps. For now, start at bottom of kuseg space.
65 mmap_start = mmap_end = 0x10000;
66}
67
68void
69MipsLiveProcess::startup()
70{
71 Process::startup();
72
65 argsInit(MachineBytes, VMPageSize);
66}
67
73 argsInit(MachineBytes, VMPageSize);
74}
75
76void
77MipsLiveProcess::argsInit(int intSize, int pageSize)
78{
79 // load object file into target memory
80 objFile->loadSections(initVirtMem);
81
82 // Calculate how much space we need for arg & env arrays.
83 int argv_array_size = intSize * (argv.size() + 1);
84 int envp_array_size = intSize * (envp.size() + 1);
85 int arg_data_size = 0;
86 for (vector<string>::size_type i = 0; i < argv.size(); ++i) {
87 arg_data_size += argv[i].size() + 1;
88 }
89 int env_data_size = 0;
90 for (vector<string>::size_type i = 0; i < envp.size(); ++i) {
91 env_data_size += envp[i].size() + 1;
92 }
93
94 int space_needed =
95 argv_array_size + envp_array_size + arg_data_size + env_data_size;
96 if (space_needed < 32*1024)
97 space_needed = 32*1024;
98
99 // set bottom of stack
100 stack_min = stack_base - space_needed;
101 // align it
102 stack_min = roundDown(stack_min, pageSize);
103 stack_size = stack_base - stack_min;
104 // map memory
105 pTable->allocate(stack_min, roundUp(stack_size, pageSize));
106
107 // map out initial stack contents
108 // ========
109 // NOTE: Using uint32_t hardcodes MIPS32 and not MIPS64
110 // even if MIPS64 was intended. This is because the
111 // copyStringArray function templates on the parameters.
112 // Elegant way to check intSize and vary between 32/64?
113 // ========
114 uint32_t argv_array_base = stack_min + intSize; // room for argc
115 uint32_t envp_array_base = argv_array_base + argv_array_size;
116 uint32_t arg_data_base = envp_array_base + envp_array_size;
117 uint32_t env_data_base = arg_data_base + arg_data_size;
118
119 // write contents to stack
120 uint32_t argc = argv.size();
121
122 if (intSize == 8)
123 argc = htog((uint64_t)argc);
124 else if (intSize == 4)
125 argc = htog((uint32_t)argc);
126 else
127 panic("Unknown int size");
128
129
130 initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize);
131
132 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
133
134 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
135
136 ThreadContext *tc = system->getThreadContext(contextIds[0]);
137
138 setSyscallArg(tc, 0, argc);
139 setSyscallArg(tc, 1, argv_array_base);
140 tc->setIntReg(StackPointerReg, stack_min);
141
142 Addr prog_entry = objFile->entryPoint();
143 tc->setPC(prog_entry);
144 tc->setNextPC(prog_entry + sizeof(MachInst));
145 tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
146}
147
148
68MipsISA::IntReg
69MipsLiveProcess::getSyscallArg(ThreadContext *tc, int i)
70{
71 assert(i < 6);
72 return tc->readIntReg(FirstArgumentReg + i);
73}
74
75void

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150MipsLiveProcess::getSyscallArg(ThreadContext *tc, int i)
151{
152 assert(i < 6);
153 return tc->readIntReg(FirstArgumentReg + i);
154}
155
156void

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